Add Rails 8.0 compatibility #332

Job	Run time
Ruby Tests (2.7, rails_6.1, stable)	32s
Ruby Tests (2.7, rails_7.0, stable)	32s
Ruby Tests (2.7, rails_7.1, stable)	33s
Ruby Tests (3.0, rails_6.1, stable)	24s
Ruby Tests (3.0, rails_7.0, stable)	24s
Ruby Tests (3.0, rails_7.1, stable)	31s
Ruby Tests (3.1, rails_6.1, stable)	29s
Ruby Tests (3.1, rails_7.0, stable)	30s
Ruby Tests (3.1, rails_7.1, stable)	28s
Ruby Tests (3.1, rails_7.2, stable)	31s
Ruby Tests (3.2, rails_7.0, stable)	27s
Ruby Tests (3.2, rails_7.1, stable)	30s
Ruby Tests (3.2, rails_7.2, stable)	28s
Ruby Tests (3.2, rails_8.0, stable)	30s
Ruby Tests (3.3, rails_7.0, stable)	26s
Ruby Tests (3.3, rails_7.1, stable)	28s
Ruby Tests (3.3, rails_7.2, stable)	1s
Ruby Tests (3.3, rails_8.0, stable)	1s
Ruby Tests (3.2, rails_edge, experimental)	26s
Ruby Tests (3.3, rails_edge, experimental)	1s
Ruby Tests (head, rails_7.1, experimental)	1s
Ruby Tests (head, rails_7.2, experimental)	1s
Ruby Tests (head, rails_8.0, experimental)	1s
Ruby Tests (head, rails_edge, experimental)	1s
Coverage	0s
	8m 16s

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